Hi just wondering if any plumbers had ever come across a problem before what we are having. A new bath was fitted 6 months ago and a shortly after small orange specks started appearing on the base of the tub. These look like rust and are no more than 2mm wide but appear in random spots. They will ony polish out with a bit of wet and dry paper but you can fill the bath up after polishing all exsisting specks away drain the water away and then within 30 mins a few fresh ones will appear. The tub is made of fibreglass with a gelcoat covering and has been replaced to rule out any casting defect but they are appearing on the new tub which i would think points to something in the water. Would be very grateful to hear from anyone who has seen this happen before or knows what could cause it.